Nut-locking device



R. L. MARTIN.

NUT LOCKING DEVICE,

APPLICATION men sEPr.21. I919.

1 ,327,83, Patented J an. 13, 1920.-

ROBERT L. MARTIN, OF THOMAS, WEST VIRGINIA.

NUT-LOCKING DEVICE.

Application filed September 27, 1919. Serial No. 326,804.

To all whom it may concern:

Be it known that I, ROBERT L. MARTIN, a citizen of the United States, residing at Thomas, in the county of Tucker and State of West Virginia, have invented certain new and useful Improvements in Nut-Locking Devices, of which the following is a specification, reference being had to the accompanymg drawings.

This mvention relates to a nut locking device, and partlcularly to a nut locking device for a1r-compressors or pumps, and has for its ob ect to provlde a device of this character which is resiliently urged at all times into engagement with the side of the nut.

, Another object is to provide a device of this character having inwardly directed ends, each of which is resiliently urged into engagement with the grooved sides of a plurality of alined spanner nuts.

Another object is to provide a locking device of this character having a novel form of spreader adapted to easily and simultaneously disengage both ends of the looking device from the alined nuts and to pre vent the ends from damaging the sides of the nuts when the device is applied and removed.

These objects are attained bythe mechanism illustrated in the accompanying drawings, in which:-

Figure 1 is a side elevation of the holding device applied to the spanner nuts of the P p;

Fig. 2 is an end view of the device re moved from the pump and showing the looking jaws;

Referring to the drawings, 5 indicates an air compressor or pump having the conventional form of spanner nuts 6 including grooves 7. The locking device comprises a pair of clamping members 8 including arms 9 which merge, at 10, into a projecting end 11. The ends 12 of the arms 9 merge into a transversely extending arm 13, the free edge 14 of the arm 13 being bent in angular re lation thereto to provide jaws adapted to be disposed in the grooves of the nuts 6. Connecting the ends 11 of each of the clamps 8 is a bowed leaf spring 15 which is connected to the ends 11 by means of rivets 16. This spring is of the contracting type and tends to urge the clamps 8 toward each other.

receive a spreader 18. The spreader consists of a shank 19 havingat one end a handle 20 and at the other end a circular spreading plate 21.

The shank 19 is in- Specification of Letters Patent. Patented all. 13,1920.

' portion of the spring 15' and is intended to tended t'o-be freely disposed through the 7 opening 17 to permit the unobstructed slid-' mg movement of, said shank through the opening. l g I To apply the locking device to a plurality of alined spanner nuts," the spreader is moved to, the bowedportion of the spring 17 to overcome the resistance-of the latter and force the clamps away from each other; The aws 14 of the clamps are 3 then po-' sitioned in the alined grooves in the sides of the spanner nuts and the spreader released. Thejspi'ing 17 will then-contract,

causlng the jaws 14.- to 'firmly' engage the nuts: and securely hold the properly adjusted positions.

From the foregoing, it will be re that thisinvention provides a novel locking device partic-ularly adapted for air pumps and the like, which is easily applied to the nuts, and in'view of its resilient qualities, cannot be accidentally disengaged through vibration or like forces from the nuts. In addition to this, the novel form of spreader not only permits the device to be easily and quickly applied and removed, but prevents damage to the grooved surfaces of the nuts in the applying and removing operation.

I claim 1. A locking device for a. peripherally grooved nut comprising a resilient, U-shaped same in their adily seen memberhaving its free ends engaged with the peripherally grooved nut, and means carried by saidyU-shaped member for disengaging said ends from the nut.

2. A locking device for a plurality of alined spanner nuts comprising a resilient,

. U-shaped clamp having inwardly extending ends, and means carrled by the U-shaped clamp for simultaneously. disengaging the ends of said clamp from the nut. i

A locking device for a plurality of alined spanner nuts comprising a resilient,

ROBERT L. MARTIN.

I signature. An opening 17 is provided in the bowed 

